Calculating machine



pr A. B. MACHADO 2,279,474

CALCULATING MACHINE Filed Oct. 21, 1940 4 Sheets-Sheet l 31mcntor AN THONY B. NRC/W900 (Ittorueg Apr l 14, 1942- A. B. MACHADO 2,279,474

' CALCULATING MACHINE Filed Oct. 21, 1940 4 Sheets-Shet 2 lnvcntor ANTHONY B. MAC/ A00 Gttorncg April 14,1942. AQE m HADQ' 2,279,474

v CALCQLATING MACHINE 'FiledOct. 21, 1940' 4 Sheets-Sheet :5

Zmventor ANTHONY, 5. Mar/n00- April 14, 1942.

A. B. MACHADO CALCULATING MACHINE Filed Oct. 21, 1940 4 Sheets-Sheet 4 Znwenfot ANTHONY 5. Mn CHADO- (Ittotneg Patented Apr. 14, 1942 S PATENT OFFICE CALCULATING MACHINE Anthony B. Machado, Oakland,

Calif., assignor to Frlden Calculating Machine Co., Inc., a corporation of California Application October 21, 1940, Serial No. 362,021

9 Claims.

This invention relates to calculating machines and is concerned more particularly with the provision of improved means for resetting a register.

It is an object of the invention to provide an improved construction for effecting the return of the register toa predetermined or end position coupled with resetting of the register.

' Another object of the invention is to provide a mechanism of the character referred to which is of a silent character.

Another object of the invention is to provide mechanism of the character referred to in which only a single cycle of the resetting mechanism is effected although the drive therefor may be enabled for one or more cycles of operation.

Other objects and advantages of the invention will be apparent from the following description of preferred embodiments in'which:

Figure 1 is a longitudinal sectional view through the rear portion of a calculating machine embodying my invention; I

Figure 2 is a fragmentary sectional view showing the front end of the section shown in Figure 1;

Figure 3 is a plan view partially in section with certain parts omitted and others shown schematically;

'Figure 4 is a sectional side elevational' view of the machine illustrating the shift and resetting control keys;

Figure 5 is a fragmentary detailed view showing the clutch construction;

Figure 6 is a fragmentary detailed view showing a part of the shiftingwcontrol mechanism;

Figure 7 is a rear elevational view partly in v section of the upper portion of the calculating machine;

Figure 8 is a fragmentary operational view; Figure 9 is a fragmentary operational view. The invention is disclosed as embodied in a calculating machine having actuating mecha-.

nism of the uni-directional, continuous drive cycle type wherein all power driven operations are effected by engagement and disengagement of a single clutch providing the only path of power from the motor of the machine. A calculating machine of this construction is disclosed in the copending application of Carl M. Friden,

Ser. No. 42,266, filed September 26, 1935.

The frame of the machine may include a base ll (Figure 1) upon which casing. II is suitably upon base I.. Side plates i2 and It may be connected by various cross brackets l6, l1, l8 and I! which serve various mechanism of the machine. The register carriage 22 is mounted on the frame brackets l6 and I! by rollers 23 for endwise shifting movement laterally of the machine in either direction to various ordinal positions as controlled by means described hereinafter.

Carriage 22 includes a frame 3| in which numeral wheels shafts 32 are journaled to carry numeral wheels 33 of conventional construction. To transmit increments of value to numeral wheels 33, each shaft 32 extends below the frame 3| and has a ten tooth gear 34 which is actuated by means later described.

Accumulator resetting means including means such as a rack bar 4| mounted for endwise sliding movement in the carriage frame adjacent the upper end of the numeral wheel shafts 32 for cooperation with mutilated gears 42 carried by numeral wheel shafts 32. Adjacent gears 42 are axially offset to cooperate with the adjacent vertically ofiset racks found on rack bar 4| in the usual manner. The rack bar 4| is moved from its normal position to which it is spring urged in the usual manner to engage gears 42 of any numeral wheel 33 displaced from the zero position and thereby reset the numeral wheels. Rack 4| may be operated manually in a conventional fashion or may be selectively connected to an actuating bar 46 mounted on the frame 3| for endwise movement by means of suitable mechanism as disclosed, for example, in the copending application of Carl M. Friden, Ser. No. 240,269, filed November 14, 1938.

Revolutions counter The revolutions counter may comprise numeral wheels 5| on respective shafts 52 and may be actuated by means of the actuator 54 in the usual manner. Counter numeral wheels 5| may be reset to zero by rack bar 53'similar to the rack bar 4| described above and also adapted for connection with the actuating bar 4G by suitable interponent means as disclosed in said application 240,269. The revolutions counter mechanism is conventional in all respects, and a further description is not believed necessary.

I Selecting and actuating mechanisms The values to be introduced into numeral wheels 33 are selected by means of a plurality of banks or orders of settable value keys 3| (Figures 1 and 2). The keys 3| of each bank cooperate with selecting mechanisms including spring urged selecting slides 62 mounted for endwise movement to position gears 63 selectively with respect to the stepped teeth 64 of the associated actuating cylinder 66. Cylinders 63 (Figures 1 and 3) for adjacent orders are mounted on actuating shafts 61 having suitable bevel gear connections with a transverse drive shaft 68 which is suitably journaled in side plates :2 and I3. Shaft 68 and shafts 61 are driven cyclically from motor 63 through clutch II which may be driven by suitable gearing I2 (Figure 4) from the motor shaft 13. Clutch II (Figure 5) may be engaged or disengaged by oscillation of spring urged clutch pawl or dog 14 mounted for rotation with shaft 68, and with respect to ratch et 13 journaled on shaft 68 and driven by gearing I2. Clutch control lever TI is pivoted on side plate I3 at I8 to determine engagement or disengagement of the clutch by releasing or engaging the nose of dog I4 in the full cycle position thereof.

The number of increments transmitted to the pair of gears 63 of an order by the associated cylinder 63 during cyclic operation of the clutch is transmitted to square shaft 3| on which gears 63 are mounted. Each shaft 3| extends rearwardly of the machine in the usual manner and carries a spool 82 having bevel gears 83 and 84 for cooperation with the aligned numeral wheel gears 34.

The selective engagement of gears 83 and 84 with gears 34 (Figure 1) is controlled by strap 85 positioned between the gears and mounted by suitable arms 83 for rocking movement with shaft 81. Thus, rocking of shaft 31 determines transmission of said increments to the numeral wheels 33 and also the direction of entering thereon. Any suitable control means may be provided for rocking the shaft 31 to control digitation operations. Shaft 81 may be centralized by opposed spring urged centralizing arms 9i cooperating with a central stop 32 and engaging a pin 93 carried by one of arms 86 on which the strap 35 is mounted.

Carriage shift mechanism The carriage can be shifted in either direction by power driven means controlled by manually operable keys, and this mechanism is of conventional construction. Carriage 22 (Figure 7) is provided with toothed plate IN along the rear side thereof for cooperation with shift pins I32 (Figure 7) on shift gear I03. Shift gear I03 can be rotated in either direction and receives onehalf rotation for each rotation of clutch II referred to above. For this purpose, shift gear E33 is connected by reversing gearing to respective gear sleeves E06, I31 (Figures 3 and 7), the gearing being arranged so that when driven from gear sleeve I06 the rotation is in one direction,

and when driven from gear sleeve IO! rotation is in' the other direction. The respective gear sleeves I03, I01 (Figure 3) are slotted for engagement by toothed collars I03, I09 mounted on the rearward ends of a pair of adjacent actuating shafts 61. The collars I08 and I03 are provided with slidable driving connections III} with the actuating shafts. The sliding movement of collars I03 and I 09 is controlled by means of rods II I, H2 which extend forwardly of the machine.

a with respective levers H6 and III.

Shift keys H3 and H4 (Figure 4) for operating respective pins H5 (Figure 6) for cooperation Lever H6 (Figures 3 and 6) is secured to transverse shaft I I8 while lever I I? is secured to sleeve I I9 mounted on shaft I I8. Both shaft II 8 and sleeve H3 are provided with respective depending arms I20 having their lower ends disposed in front of associated rods III. I I2 respectively, to determine operation thereof upon depression of the associated shift key.

To enable the drive by depression of the shift keys, the respective pins I I5 (Figure 4) thereof cooperate with cam slots in a pivoted lever I2I which is pivotally connected at its lower end to the upper end of lever I22 carrying an insulated pin I23 at its lower end. Pin I23 is adapted to close contacts I24 of the motor circuit upon depression of the shift key. Lever I2I is also connected by link I26 (Figures 4 and 5) with clutch control lever 11 so that such lever is rocked to clutch engaging position upon depression of a shift key.

From the foregoing, it is seen that the carriage can be shifted selectively in either direction by operation of keys H3 and I I4.

Resetting drive and control mechanism The means for effecting return and resetting of the registers may be effected by operation of key I3! (Figure 3) which operates to first effect return of the carriage to its leftmost position, and then to reset the registers. Upon depression of key I3I, it is latched in depressed position by a latch slide I32 mounted on side plate I3 for endwise movement. Slide I32 is urged to the left as viewed in Figure 4 by spring I33 connected to the pivot pin between slide I32 and its supporting and releasing bellcrank I34. The release of latch I32 is referred to hereinafter.

Depression of key I3! serves to enable the shifting mechanism to cause shifting of the carriage to its leftmost position, to enable the resetting drive connection for power resetting of the accumulator and the revolutions counter, as well as to enable the drive. Adjacent its lower end, key I3I is slotted to engage pin I36 on arm I31 (Figures 3 and 4) carried by a transverse shaft I33 journaled in side plates I2 and I3. Shaft I38 carries arm I (Figures 1 and 3) having a pivotal connection I42 with a forwardly extending pusher arm I43. Pivotal connection I42 is preferably made in the form of an adjustable eccentric to enable adjustment of pusher arm I43. Arm. I43 is spring urged in a clockwise direction by a spring I44, so that notched end I46 thereof is in engagement with rod 1.

Rod I41 (Figure 3) isspring urged forwardly by a spring I43 secured to a shifting fork I49 on rod 54? and engaging shiftable toothed collar I50 engageable with slotted hub E5! of a cam I52.

Cam I52 (Figures 1 and 7) operates arm I53 which in turn operates actuating slide I54 for the resetting operation. arm I56 secured on the actuating bar 46. Ann I 56 is not lowered intoengagementwith the actuating slide therefor untilthe exit; of the shifting operation when the carriage'is moving from the position shown in Figure 7 toward its leftmost position (to the right as viewed in Figure 7),be-

cause of pawl I58 cooperating with' ledge I59 maintain the arm I 5 6 raised 'as'the carriage is' moving through its next to 'leftmost position'as' viewed from the front of then'iachine." Thus,

slide I54 cooperates with having a depending arm upon depression of the return and re-setting control key the resetting drive connection is enabled, but resetting cannot occur unless the carriage is in its leftmost position or until it is returned to such position if displaced therefrom, as later described, While the drive for the resetting cam is effective, arm I56 is maintained inactive until the last cycle of operation when the carriage is in its leftmost position.

To enable return of the carriage, pusher arm I43 (Figures 1 and 3) carries pin I6I which is cooperatively related to depending arm I62 which is secured on shaft II8. Thus, upon rearward movement of pusher arm I43, arm I62, shaft H8, and arm I20 thereon are rocked to shift rod III rearwardly and thereby engage the left hand shift mechanism.

To enable the drive .upon depression of the return clear key I3I,- roller, I66 thereon (Figures 4 and 5) is adapted to engage cam edge I61 of clutch control lever 11 to rock the lever to clutch engaging position. Lever 11 when rocked to clutch engaging position also operates through link I26 and levers I2I and I22 to close contacts I24.

In order to prevent more than one operation of the resetting means at the end of the shifting operation, yieldable over-ride pawl I1I (Figure '7) which cooperates with shift gear I03 in the leftmost position of the carriage to prevent attempted shifting beyond such position has an extension I12 overlying a slide I13 (Figures 3 and '1) mounted on the bracket I9 for vertical movement. Slide I13 when moved downwardly engages one arm I14 (Figure I15 connected by a link I16, with arm I11 depending from a cross shaft I18. Cross shaft l18 (Figures l and 3) carries an arm I19 having a notched laterally offset end I80 which underlies arm I43. Thus, during a cycle of the machine in which the resetting operation is effected, arm I19 will be operated to lift arm I43 out of engagement with rod I41, so that the rod I41 is restored to its inactive position to disconnect the drive means. Also the lifting movement of arm I43 (Figure 1) lifts pin I6I out of engagement with arm I62 to disable the control linkage of the left hand shift mechanism. Thus,

even though the return-clear key be maintained depressed, only one cycle of resetting operation can occur. The mechanism described above is of the character disclosed in said Friden application Serial No. 240,269.

As seen in Figure '1, spring I8I which urges arm I53 against cam I52 is secured at one end to pin I82 on arm I53 which upon oscillation of the arm I53 to its extreme position by cam I52, is adapted for engagement with notched end I83 of latch arm I84 pivoted at I86 on bracket I81 in which the cam I52 is also journaled. Latch arm I84 is urged in a clockwise direction by spring I88 so that upon oscillation of arm I53 by cam I52 upon initial depression of the return clear key, notched end I83 will engage pin I82 to prevent further oscillation of the arm I53 until the carriage reaches its end position.

During the return of the carriage to its end position, means is brought into play to disable the latch arm I84 so that the cam follower .arm I53 which operates the resetting mechanism from the cam I52 is again free to follow the cam. For this purpose the carriage shift rack IOI carries a roller ISI which is adapted for engagement with cam extension I92 of the arm I84 as the carriage is entering its left-most position. This con- 4) of a bellcrank dition of the parts is shown in Figure 8 where the cam follower arm I53 is latched in displaced position by the latch lever I84 and the roller ISI is just beginning its engagement with the cam extension I92 of the latch lever. Preferably the timing of the parts is such that the release of the cam follower arm just as the high point of the cam I52 is in position to engage the roller on the cam follower lever as shown in Figure 9, so that there is no appreciable impact or noise accompanying the release of such lever. After its release, cam I53 during its next rotation oscillates the arm I53 and operates the slides I54 and 46 to perform the resetting operation.

During the resetting cycle the key I3I is released by the operation of bell crank I34 by the extension I12 of pawl I1I so that latch I32 is withdrawn.

Iclaim'.

1. In a calculating machine having a'shiftable register and return and resetting mechanism therefor, said mechanism being operable to return saidregister to a predetermined position if displaced therefrom and to eflect resetting of said register, drive means, said mechanism including a resetting cam having a drive connection with 'said drive means, an arm oscillated by said cam, a latch for holding said arm out of cooperation with said cam, a spring urging said latch to active position, and means responsive to said register when it is returned to said predetermined position for disabling said latch.

2. In a calculating machine having'a shiftable register and return and resetting mechanism therefor, said mechanism being operable to return said register to a predetermined position if displaced therefrom and to effect resetting of said register, drive means, said mechanism including a resetting cam having a drive connection with said drive means, an arm oscillated by said cam, a latch for holding said arm out of cooperation with said cam, a spring urging said latch to active position, and means responsive to said register when it is returned to said predetermined position for disabling said latch, said last named means including an element shiftable with said register and engageahle with said latch to effect disabling thereof.

3. In a calculating machine having a shiftable register and return and resetting mechanism therefor, said mechanism being operable to return said register to a predetermined position if displaced therefrom and to effect resetting of said register, drive means, said mechanismineluding a resetting cam having a drive connection with said drive means, an arm oscillated by said cam, a latch for holding said arm out of cooperation with said cam, a spring urging said latch to active position, and means responsive to said register when it is returned to said predetermined position for disabling said latch, said last named means including an element shiftable with said register and engageable with said latch to effect disabling thereof, said latch and said element being cooperatively related and arranged so that disabling of the latch is effected while said arm is cooperatively related to the high portion of said cam.

4. In a calculating machine having a shiftable register and return and resetting mechanism therefor, said mechanism being operable to return said register in step-by-step fashion to a predetermined position if displaced therefrom and to effect resetting of said register, drive I53 from. its latch occursmeans for said mechanism, said mechanism including a resetting cam having a drive connection with said drive means, an arm oscillated by said cam between an inward position and an out ward position, latch means for automatically engaging said arm upon movement thereof by said cam from said inward to said outward position to hold said arm in said outward position, and latch releasing means operable in timed relation to the rotation of said cam and during the last step of return movement of said register for disabling said latch means with said cam in a position corresponding to the outward position of said arm whereby said arm is restored into 0perative relation with said cam for the resetting portion of the return and resetting operation.

5. In a calculating machine having a shiftable register and cyclically operable return and resetting mechanism therefor, said mechanism being operable to return said register to a predetermined position if displaced therefrom and to effect resetting of said register during a resetting cycle of operation of said mechanism, drive means, a resetting cam having a drive connection with said drive means, an arm oscillated by said cam between an inward position and an outward position, latch means for automatically engaging said arm upon movement thereof by said cam from said inward to said outward position to hold said arm in said outward position, latch 1 releasing means operable in timed relation to the rotation of said cam for disabling said latch means with said cam in a position correspond ing to the outward position of said arm, and

means for operating said releasing means during the last cycle of operation prior to the resetting cycle.

6. In a calculating machine having a shiftable register and return and resetting mechanism therefor, said mechanism being operable to return said register to a predetermined position if displaced therefrom and to effect resetting of said register, drive means, a resetting cam having a drive connection with said drive means,

an arm oscillated by said cam between an inward position and an outward position, latch means for automatically engaging said arm upon movement-thereof by said cam from said inward to said outward position to hold said arm in said outward p sition, and latch releasing means operable in timed relation to the rotation of said cam for disabling said latch means with said cam in a position corresponding to the outward position of said arm, said releasing means serving to hold said latch means inactive when said carriage is in said predetermined position.

7. In a calculating machine having a shiftable carriage, a register in said carriage, means for resetting said register including a cam and a cam follower, drive means for said resetting means, control means for enabling said drive means with respect to said resetting means, and automatically operable means brought into play by movement of said cam follower by said cam for holding said cam follower in an inactive position with reference to said cam.

8. In a calculating machine having a shiftable carriage, a register in said carriage, means for shifting said carriage, means for resetting said register including a cam and a cam'follower, common drive means for said shifting and resetting means, control means for simultaneously enabling said drive means with respect to said shifting and resetting means, automatically operable means brought into play by movement of said cam follower by said cam for holding said cam follower in an inactive position with reference to said cam, and means on said carriage for disabling said holding means.

9. In a calculating machine having a shiftable carriage, a register in said carriage, means for shifting said carriage, means for resetting said register, said resetting means including a cyclically operable drive train having a rotating portion and a reciprocating portion, means for initiating a plural cycle operation of said drive train, and means cooperatively related to said reciprocating portion and brought into play upon initial movement of said reciprocating portion by said rotating portion for maintaining said reciprocating portion inactive until near the end of the plural cycle operation, said rotating portion being maintained active throughout said plural cycle operation.

ANTHONY B. MACHADO. 

